From: Eric Dumazet <eric.dumazet@gmail.com>
To: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>, Ingo Molnar <mingo@redhat.com>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
David Howells <dhowells@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Eric Dumazet <edumazet@google.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Manfred Spraul <manfred@colorfullife.com>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 4/6] kernel: faster queue spinlock implementation
Date: Wed, 23 Jan 2013 16:18:14 -0800 [thread overview]
Message-ID: <1358986694.12374.1267.camel@edumazet-glaptop> (raw)
In-Reply-To: <1358896415-28569-5-git-send-email-walken@google.com>
On Tue, 2013-01-22 at 15:13 -0800, Michel Lespinasse wrote:
> {
> - __q_spin_unlock(lock, node);
> - preempt_enable_no_resched();
> - local_bh_enable_ip((unsigned long)__builtin_return_address(0));
> + unsigned int cpu, i;
> + struct q_spinlock_token *token;
> + for_each_possible_cpu(cpu)
> + for (i = 0; i < 2; i++) {
> + token = kmalloc(sizeof(struct q_spinlock_alloc_token),
> + GFP_KERNEL);
> + BUG_ON(!token);
> + token->wait = false;
> + per_cpu(q_spinlock_token[i], cpu) = token;
> + }
You might use kmalloc_node(... , cpu_to_node(cpu)) to spread these
tokens on all nodes.
next prev parent reply other threads:[~2013-01-24 0:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 23:13 [RFC PATCH 0/6] fast queue spinlocks Michel Lespinasse
2013-01-22 23:13 ` [RFC PATCH 1/6] kernel: implement queue spinlock API Michel Lespinasse
2013-02-07 22:34 ` Paul E. McKenney
2013-02-07 22:56 ` Eric Dumazet
2013-02-07 23:53 ` Paul E. McKenney
2013-02-07 23:58 ` Michel Lespinasse
2013-02-08 0:03 ` Eric Dumazet
2013-02-08 0:40 ` Paul E. McKenney
2013-02-08 3:48 ` Michel Lespinasse
2013-02-08 4:36 ` Paul E. McKenney
2013-02-08 5:03 ` Paul E. McKenney
2013-02-08 5:11 ` Michel Lespinasse
2013-02-08 16:17 ` Paul E. McKenney
2013-02-07 23:14 ` John Stultz
2013-02-08 0:35 ` Michel Lespinasse
2013-01-22 23:13 ` [RFC PATCH 2/6] net: convert qdisc busylock to use " Michel Lespinasse
2013-01-22 23:13 ` [RFC PATCH 3/6] ipc: convert ipc objects " Michel Lespinasse
2013-01-22 23:13 ` [RFC PATCH 4/6] kernel: faster queue spinlock implementation Michel Lespinasse
2013-01-23 21:55 ` Rik van Riel
2013-01-23 23:52 ` Michel Lespinasse
2013-01-24 0:18 ` Eric Dumazet [this message]
2013-01-25 20:30 ` [RFC PATCH 7/6] kernel: document fast queue spinlocks Rik van Riel
2013-01-22 23:13 ` [RFC PATCH 5/6] net: qdisc busylock updates to account for queue spinlock api change Michel Lespinasse
2013-01-22 23:13 ` [RFC PATCH 6/6] ipc: object locking " Michel Lespinasse
2013-01-22 23:17 ` [RFC PATCH 0/6] fast queue spinlocks Michel Lespinasse
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